Electric-field effects on the spin-density wave in magnetic ferroelectrics

Sparavigna, Amelia Carolina; Strigazzi, Alfredo; Zvezdin, A. K.

doi:10.1103/physrevb.50.2953

Cited by 82 publications

(79 citation statements)

References 14 publications

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“…the difference of sub-lattices polarization) [24] Flexo-antiferrodistortive In its initial form the flexoelectric coupling between the polarization and strain gradient is universal for macro and nanoscale objects [41,42,43,44,45]. Flexoelectric and all other couplings from the Table 1 lead to the appearance of improper ferroelectricity in multiferroics with the inhomogeneous spontaneous strain [32], magnetization [33,34], aniferromagnetic [35,36] or antiferroelectric order parameter [24] or antiferrodistortions. Here, we explore the antiferrodistortive coupling, since antiferrodistortive modes are virtually present in all the perovskites.…”

Section: Flexoelectric Effectsmentioning

confidence: 99%

Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics

Eliseev

Kalinin

et al. 2013

Phys. Rev. B

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We proved the existence of a universal flexo-antiferrodistortive coupling as a necessary complement to the well-known flexoelectric coupling. The coupling is universal for all antiferrodistortive systems and can lead to the formation of incommensurate, spatially-modulated phases in multiferroics. Our analysis can provide a self-consistent mesoscopic explanation for a broad range of modulated domain structures observed experimentally in multiferroics. * sergei2@ornl.gov † morozo@i.com.ua

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Section: Flexoelectric Effectsmentioning

confidence: 99%

Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics

Eliseev

Kalinin

et al. 2013

Phys. Rev. B

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“…It is remarkable that inhomogenous magnetoelectric interaction (2) can explain magnetoelectric effect in magnetic domain walls [31][32][33] and ferroelectricity in spiral magnets [34] under the assumption of polarization induced by magnetic inhomogeneity. Furthermore, there is a profound analogy between spatially modulated spin structures in multiferroics, and spatially modulated structures in nematic liquid crystals [35,36]. The periodic vector director structures in a nematic liquid crystal arise in an external electric field (i.e., a flexoelectric effect), and can be tuned under an applied electric field.…”

Section: Fig 3 Experimental Evidences For Spin Cycloid Existence: (Amentioning

confidence: 99%

Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

et al. 2006

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Magnetic phase transitions in multiferroic bismuth ferrite (BiFeO3) induced by magnetic field, epitaxial strain, and composition modification are considered. These transitions from a spatially modulated spin spiral state to a homogenous antiferromagnetic one are accompanied by the release of latent magnetization and a linear magnetoelectric effect that makes BiFeO3-based materials efficient room-temperature single phase multiferroics.Since the beginning of the multiferroic era (in the early 1960s), after Soviet scientists discovered a new class of materials that was called "ferroelectromagnets" [1], to our present time, bismuth ferrite BiFeO 3 has remained the prototypical example of a multiferroic: having a relatively simple structure and at the same time quite diversified and uncommon properties.On the one hand due to its simple chemical and crystal structure, BiFeO 3 is a model system for fundamental and theoretical studies of multiferroics [2]. However, on the other hand, its unusual magnetic symmetry properties (space and time symmetry violation both in its crystal and magnetic structures) results in a variety of nontrivial consequences, including: (i) the unique coexistence of weak ferromagnetism and linear magnetoelectricity [3,4]; (ii) a toroidal moment, i.e., a special magnetic type of ordering [5][6][7][8]; (iii) the existence of an incommensurately modulated spin structure [9], previously only observed in magnetic metals; and (iv) magnetically induced optical second harmonic generation, observed for the first time in this particular material [10]. Furthermore, BiFeO 3 is the material with unique high ferroelectric Curie (T C =1083 K) [11] and antiferromagnetic Neel (T N =643K) [12] temperatures. However, its potential has yet to be realized, and might never be fully exploited. Difficulties persist as the magnetoelectric exchange and weak ferromagnetism are locked within a spin cycloid. A fundamental problem is that electronic configurations that favor magnetism are antagonistic to those that favor polarization [2] -compromise is necessary. Recently, investigations have shown that the multiferroic properties of BiFeO 3 can be dramatically increased by (i) epitaxial constraint [13], and/or (ii) rare earth substituents. These findings coupled with those in ME two-phase (nano and macro) composites of piezoelectric and magnetostrictive materials have served as triggers for a "magnetoelectric renaissance": the revival of hope to find a room temperature magnetoelectric material with significant coupling of polar and magnetic subsystems [14][15][16]. As a consequence, multiferroics are now being considered as promising materials for spintronics [17,18], magnetic memory systems, sensors, and tunable microwave devices [19]: offering the potential to revolutionize electromagnetic material's applications.

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“…The influence of electric field on micromagnetic structure was predicted theoretically in the series of works [5][6][7][8][9]. These theoretical models took into account the so-called inhomogeneous magnetoelectric interaction that gives rise to electric polarization associated with magnetic inhomogeneities.…”

Section: Theoretical Analysis and Discussionmentioning

confidence: 99%

Magnetic domain wall motion triggered by electric field

Pyatakov

Сергеев

Sechin

et al. 2010

J. Phys.: Conf. Ser.

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Electric-field effects on the spin-density wave in magnetic ferroelectrics

Cited by 82 publications

References 14 publications

Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics

Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics

Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Magnetic domain wall motion triggered by electric field

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Electric-field effects on the spin-density wave in magnetic ferroelectrics

Cited by 82 publications

References 14 publications

Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics

Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics

Phase transitions in multiferroic BiFeO3crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’

Magnetic domain wall motion triggered by electric field

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Phase transitions in multiferroic BiFeO₃crystals, thin-layers, and ceramics: enduring potential for a single phase, room-temperature magnetoelectric ‘holy grail’